In-situ leaching
The present invention relates to in-situ leaching of uranium, particularly employing an acidic leach liquor containing an oxidant, and especially in respect of ores containing significant amounts of transition metals that act as catalysts for peroxidant decomposition. When hydrogen peroxide is used as oxidant under such conditions it decomposes leading to the formation of gas bubbles and exacerbation of ore-blinding, and a reduction in the efficiency of extraction of uranium. The present invention employs peroxymonosulphuric acid as oxidant and thereby ameliorates the problems aforesaid. Preferably, additionally, sulphuric acid is present in the leach liquor and in many preferred embodiments the peroxymonosulphuric acid concentration is from 0.001 to 0.03 moles/liter and the sulphuric acid from 0.025 to 0.075 moles/liter.
- Assignee:
- Interox Chemicals Ltd. (United Kingdom)
- Patent Number(s):
- US 4344923
- OSTI ID:
- 6671554
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
CATALYSTS
DISPERSIONS
DISSOLUTION
ELEMENTS
HYDROGEN COMPOUNDS
IN-SITU PROCESSING
INJECTION WELLS
INORGANIC ACIDS
LEACHATES
LEACHING
METALS
MINING
MIXTURES
ORES
OXIDIZERS
PROCESSING
SEPARATION PROCESSES
SOLUTION MINING
SOLUTIONS
SULFURIC ACID
TRANSITION ELEMENTS
UNDERGROUND MINING
URANIUM ORES
VANADIUM
WELLS